drm: bridge: analogix/dp: add panel prepare/unprepare in suspend/resu…

…me time Turn off the panel power in suspend time would help to reduce power waste. Tested-by: Caesar Wang <[email protected]> Tested-by: Douglas Anderson <[email protected]> Tested-by: Heiko Stuebner <[email protected]> Tested-by: Javier Martinez Canillas <[email protected]> Signed-off-by: Yakir Yang <[email protected]>
qiangzhao · Apr 5, 2016 · 211f276 · 211f276
1 parent 398a399
commit 211f276
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1400,6 +1400,12 @@ int analogix_dp_suspend(struct device *dev)
 	struct analogix_dp_device *dp = dev_get_drvdata(dev);
 
 	clk_disable_unprepare(dp->clock);
+
+	if (dp->plat_data->panel) {
+		if (drm_panel_unprepare(dp->plat_data->panel))
+			DRM_ERROR("failed to turnoff the panel\n");
+	}
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(analogix_dp_suspend);
@@ -1415,6 +1421,13 @@ int analogix_dp_resume(struct device *dev)
 		return ret;
 	}
 
+	if (dp->plat_data->panel) {
+		if (drm_panel_prepare(dp->plat_data->panel)) {
+			DRM_ERROR("failed to setup the panel\n");
+			return -EBUSY;
+		}
+	}
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(analogix_dp_resume);